Reading of 801 volts on ST-70 5AR4 socket! What Gives?

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I just followed the instructions that a kind gentleman posted for me on how to test the voltage at various points on my ST-70 as I am trying to figure out why it distorts, and the tubes start to flicker at a high volume. While testing I got a reading of 801 volts AC betweet pins 4 and 6 on the 5AR4 rectifier tube socket, it's supposed to be 360, any idea what is throwing it off so violantly? Also, is there any way for me to test the filter cap?
Thanks
MMMbop

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Topic - Reading of 801 volts on ST-70 5AR4 socket! What Gives? - MMMBop 21:50:05 06/08/00 (3)

Re: Reading of 801 volts on ST-70 5AR4 socket! What Gives? - PÃ¤r 03:38:29 06/09/00 (0)

Re: Reading of 801 volts on ST-70 5AR4 socket! What Gives? - Uncle Ned 22:17:11 06/08/00 (1)

So it's probably not the filter cap? (nt) - MMMBop 22:52:57 06/08/00 (0)

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